<template>
  <div :class="className" :style="{height:height,width:width}" />
</template>

<script>
import echarts from 'echarts';
require('echarts/theme/macarons'); // echarts theme
import { debounce } from '@/utils';

const animationDuration = 3000;

export default {
  props: {
    className: {
      type: String,
      default: 'chart',
    },
    width: {
      type: String,
      default: '100%',
    },
    height: {
      type: String,
      default: '300px',
    },
  },
  data() {
    return {
      chart: null,
    };
  },
  mounted() {
    this.initChart();
    this.__resizeHandler = debounce(() => {
      if (this.chart) {
        this.chart.resize();
      }
    }, 100);
    window.addEventListener('resize', this.__resizeHandler);
  },
  beforeDestroy() {
    if (!this.chart) {
      return;
    }
    window.removeEventListener('resize', this.__resizeHandler);
    this.chart.dispose();
    this.chart = null;
  },
  methods: {
    initChart() {
      this.chart = echarts.init(this.$el, 'macarons');

      this.chart.setOption({
        tooltip: {
          trigger: 'axis',
          axisPointer: { // Axis indicator
            type: 'shadow', // Default is 'line', valid value can be 'shadow' | 'line'
          },
        },
        radar: {
          radius: '66%',
          center: ['50%', '42%'],
          splitNumber: 8,
          splitArea: {
            areaStyle: {
              color: 'rgba(127,95,132,.3)',
              opacity: 1,
              shadowBlur: 45,
              shadowColor: 'rgba(0,0,0,.5)',
              shadowOffsetX: 0,
              shadowOffsetY: 15,
            },
          },
          indicator: [
            { name: 'Sales', max: 10000 },
            { name: 'Administration', max: 20000 },
            { name: 'Information Technology', max: 20000 },
            { name: 'Customer Support', max: 20000 },
            { name: 'Development', max: 20000 },
            { name: 'Marketing', max: 20000 },
          ],
        },
        legend: {
          left: 'center',
          bottom: '10',
          data: ['Allocated Budget', 'Expected Spending', 'Actual Spending'],
        },
        series: [{
          type: 'radar',
          symbolSize: 0,
          areaStyle: {
            normal: {
              shadowBlur: 13,
              shadowColor: 'rgba(0,0,0,.2)',
              shadowOffsetX: 0,
              shadowOffsetY: 10,
              opacity: 1,
            },
          },
          data: [
            {
              value: [5000, 7000, 12000, 11000, 15000, 14000],
              name: 'Allocated Budget',
            },
            {
              value: [4000, 9000, 15000, 15000, 13000, 11000],
              name: 'Expected Spending',
            },
            {
              value: [5500, 11000, 12000, 15000, 12000, 12000],
              name: 'Actual Spending',
            },
          ],
          animationDuration: animationDuration,
        }],
      });
    },
  },
};
</script>
